Because of its intense gravity. Like the Earth, a grouping of matter that gathers itself, and has sufficient mass will inevitably take on a round shape as the gravity tends to pull it all toward a single point.
In fact, the Earth is SO round that if it were shrunk to the size of a billiard ball, its surface would be smoother than such a ball. Even our highest mountains wouldn't be noticable except under a microscope.
Smaller objects, such as pluto, small moons, asteroids and such are not large enough for gravity to shape them.
2007-03-15 02:05:54
·
answer #1
·
answered by Deirdre H 7
·
1⤊
0⤋
As the song by They Might Be Giantys goes "The sun is a mass of incadescent gas" The center of teh sun is very dense and exerts gravitational forces on the rest of the sun's gases. This gravity is the same in all directions. Since the gravitational force is the same in all directions, the shape that results is a sphere.
Take a string and tie it to a rock and then twirl the rock and string around you. The shape described is a circle because the tension on the string is equal in all directions as you turn around. In three dimensions, the circle becomes a sphere.
2007-03-15 09:24:45
·
answer #2
·
answered by Sldgman 7
·
0⤊
0⤋
Massive objects produce a strong gravitational field. This combined with their rotation results in the objects having an oblate spheroid shape. An oblate speroid is a surface or ellipsoid generated by rotating an ellipse about one of its axes so that the diameter of its equatorial circle exceeds the length of the axis of revolution. It is also known as oblate ellipsoid. The fact this is the stable shape for massive rotating bodies can be demonstrated with a mathematical tool known as "calculus of variations". If the sun were not rotating the shape would be spherical but the rotation causes the oblateness.
2007-03-15 09:13:57
·
answer #3
·
answered by Anonymous
·
0⤊
0⤋
Under gravity matter collects into the most efficient shape, which is spherical (not "round").
(Soap bubbles do the same - a sphere has the lowest possible surface area of any shape collecting around a body of air. In any case, the pressure inside a soap bubble is uniform, meaning that no point on the inside of the membrane will be under greater or less pressure than any other.)
The fact that the sun is spinning means that it is not a perfect sphere, as it will be wider at the equator, owing to centrifugal forces.
Why is this a religious question, exactly?
2007-03-15 09:02:41
·
answer #4
·
answered by Bad Liberal 7
·
6⤊
1⤋
The Sun is an oblate spheroid.that is like a ball only squashed at the north and south poles. Its shape is caused by its rotation, like the earth. But it is nothing compact, just a gasseous ball, driven by currents and nuclear and chemical processes. Because it is in space, the gravitational forces pull the elements and particles towards the center.
2007-03-15 09:11:45
·
answer #5
·
answered by Jedi Maiden 2
·
1⤊
0⤋
the same reason earth is round and so are the rest of the planets and any other planet or star...gravity
gravity pulls things together, so a sphere or round shape forms because it allows as much matter to be as close to the rest of the matter in a body as can be.
2007-03-15 09:07:36
·
answer #6
·
answered by squirrelman9014 3
·
0⤊
0⤋
It is not perfectly round, but the internal pressure of the expanding gas creates an equilibrium with the gravity that the gas molecules posses, therefore creating a nearly round shape. See, that's why there is no god.
2007-03-15 09:04:25
·
answer #7
·
answered by Anonymous
·
2⤊
0⤋
Because sun is a star
2007-03-15 09:02:22
·
answer #8
·
answered by maran 4
·
0⤊
1⤋
Jesus made the sun and other bodies spherical. Originally the bible tells us in the old testament that God made them all flat disks, but in the New Testament Jesus must have made them spherical.
2007-03-15 09:21:00
·
answer #9
·
answered by Anonymous
·
0⤊
0⤋
Dear Claire , it looks round, but if you look at pictures from N.A.S.A youll see that is a planet , that is a big fire ball, with large flames , or gases comming off it ,, go to Nasa . com
2007-03-15 09:19:30
·
answer #10
·
answered by clinton9992000 1
·
0⤊
0⤋